Gemstone



FIG. 1 is a front and rear side view of my new design for a gemstone;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top perspective view thereof;

FIG. 5 is a bottom perspective view thereof;

FIG. 6 is a cross-section view taken along line 6—6 on FIG. 2 thereof;

FIG. 7 is a side top perspective view thereof; and,

FIG. 8 is a side bottom perspective view thereof. 

The ornamental design for gemstone, as shown and described. 